First off, these were tech vendors giving kickbacks to the CIO, not producers bribing studio execs to get someone specific cast.
But you seem to be missing that kickbacks aren't illegal in and of themselves. Netflix corporate didn't have to institute an anti-kickback policy for its employees. But they did, likely because they didn't want an environment where execs are negotiating both for the company and for themselves. The moment an executive violates corporate policy to enrich themselves, it becomes fraud.
First off, these were tech vendors giving kickbacks to the CIO, not producers bribing studio execs to get someone specific cast.
But you seem to be missing that kickbacks aren't illegal in and of themselves. Netflix corporate didn't have to institute an anti-kickback policy for its employees. But they did, likely because they didn't want an environment where execs are negotiating both for the company and for themselves. The moment an executive violates corporate policy to enrich themselves, it becomes fraud.